Spin injection properties in trilayer graphene lateral spin valves | Zendy

Y. P. Liu | Zendy; Hiroshi Idzuchi | Zendy; Yasuhiro Fukuma | Zendy; Olivier Rousseau | Zendy; Y. Otani | Zendy; Wen Siang Lew | Zendy

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Spin injection properties in trilayer graphene lateral spin valves

Author(s) -

Y. P. Liu,

Hiroshi Idzuchi,

Yasuhiro Fukuma,

Olivier Rousseau,

Y. Otani,

Wen Siang Lew

Publication year - 2013

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4776699

Subject(s) - permalloy , graphene , spin valve , condensed matter physics , spin diffusion , spin (aerodynamics) , materials science , ferromagnetism , electrical resistivity and conductivity , injector , spintronics , spin polarization , magnetoresistance , nanotechnology , physics , magnetization , magnetic field , thermodynamics , quantum mechanics , electron

We report on the electrical injection and detection of spin accumulation in trilayer-graphene/MgO/Permalloy lateral spin-valve (LSV) structure. Non-local spin valve signal is clearly observed in the LSV, indicating that spin coherence extends underneath all ferromagnetic contacts. We also show that low-resistivity graphene/MgO/Py junctions enable efficient spin injection and detection in LSV with high applied current density, which leads to large spin accumulation of 120 μV at room temperature. A spin diffusion length of 1.5 μm was obtained for the injector-detector separation dependence of spin valve signal measurements carried out at room temperature, while at T = 10 K, the diffusion length increases to 2.3 μm.

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